Basic Anatomy Course: Bones and Muscles

Lesson 1 • Overview of Body Cavities and Regions

Identifies major body cavities and their contents. Orients students to the spatial relationships that govern bone and muscle positioning.

Lesson 2 • Levels of Structural Organization

Examines the hierarchy from atoms to organ systems. Contextualizes where bones and muscles fit within the body's overall architecture.

Lesson 3 • Anatomical Terminology and Orientation

Covers directional terms, body planes, and regional names. Provides the shared language used throughout all subsequent anatomy study.

Lesson 1 • Classification of Bones by Shape

Categorizes bones as long, short, flat, irregular, or sesamoid. Connects shape to function and location in the body.

Lesson 2 • Composition of Bone Tissue

Details the organic and inorganic components that give bone its strength and flexibility. Links chemical composition to mechanical properties.

Lesson 3 • Bone Development and Remodeling

Covers ossification processes and the continuous remodeling cycle. Explains how bones grow, repair, and respond to mechanical stress.

Lesson 4 • Gross Anatomy of a Long Bone

Identifies diaphysis, epiphyses, periosteum, endosteum, and medullary cavity. Establishes structural landmarks referenced in later skeletal chapters.

Lesson 1 • Bones of the Skull

Identifies cranial and facial bones, sutures, and foramina. Establishes the bony framework that protects the brain and anchors facial muscles.

Lesson 2 • Structure of a Typical Vertebra

Details the body, arch, processes, and foramina of a standard vertebra. Provides the template for comparing regional vertebral variations.

Lesson 3 • The Thoracic Cage

Examines the sternum, ribs, and costal cartilages as a protective and respiratory unit. Links rib classification to breathing mechanics.

Lesson 1 • Pelvic Girdle and Lower Limb Bones

Describes the hip bones, femur, tibia, fibula, and foot bones. Emphasizes weight-bearing adaptations distinguishing lower from upper limb bones.

Lesson 2 • Joints and Articulations Overview

Classifies joints by structure and function, focusing on synovial joints. Prepares students to understand how bones interact at movement sites.

Lesson 3 • Surface Landmarks and Palpation Points

Identifies bony prominences used in clinical assessment and muscle attachment mapping. Bridges skeletal anatomy to practical physical examination skills.

Lesson 1 • Types of Muscle Tissue

Compares skeletal, cardiac, and smooth muscle by structure and control. Focuses attention on skeletal muscle as the primary subject of this course.

Lesson 2 • The Sliding Filament Theory

Explains actin-myosin cross-bridge cycling as the molecular basis of contraction. Connects calcium release and ATP use to force production.

Lesson 3 • The Neuromuscular Junction

Describes how motor neurons communicate with muscle fibers via acetylcholine. Links neural signaling to the initiation of the contraction cycle.

Lesson 4 • Microscopic Anatomy of Skeletal Muscle

Details the hierarchy from muscle belly to myofilaments. Introduces sarcomere structure as the functional unit of contraction.

Lesson 1 • Neck and Throat Muscles

Covers the platysma, sternocleidomastoid, scalenes, and suprahyoid group. Links these muscles to head movement, swallowing, and breathing assistance.

Lesson 2 • Muscles of the Thorax and Breathing

Examines the diaphragm, intercostals, and accessory respiratory muscles. Explains how muscle contraction drives inhalation and exhalation mechanics.

Lesson 3 • Muscles of Facial Expression and Mastication

Names the superficial facial muscles and the four muscles of chewing. Connects each muscle to its cranial nerve innervation and functional movement.

Lesson 4 • Abdominal Wall Muscles

Identifies the four abdominal muscle layers and their fiber orientations. Connects their combined action to trunk flexion, rotation, and core stability.

Lesson 1 • Muscles of the Forearm

Surveys the anterior flexor and posterior extensor compartments of the forearm. Distinguishes superficial from deep layers and their wrist and finger actions.

Lesson 2 • Muscles of the Rotator Cuff

Identifies the four rotator cuff muscles and their stabilizing role at the glenohumeral joint. Explains how cuff integrity prevents shoulder dislocation.

Lesson 3 • Intrinsic Muscles of the Hand

Identifies the thenar, hypothenar, and interosseous muscle groups. Explains how these small muscles enable fine motor control and grip.

Lesson 4 • Muscles of the Arm

Examines the biceps brachii, brachialis, triceps brachii, and coracobrachialis. Connects anterior and posterior compartment muscles to elbow and shoulder actions.

Lesson 1 • Muscles of the Hip and Gluteal Region

Covers the gluteus maximus, medius, minimus, and deep lateral rotators. Links these muscles to hip extension, abduction, and pelvic stabilization during gait.

Lesson 2 • Posterior Thigh Muscles

Identifies the hamstring group: biceps femoris, semitendinosus, and semimembranosus. Connects their dual role in hip extension and knee flexion.

Lesson 3 • Muscles of the Leg

Surveys the anterior, posterior, and lateral compartments of the leg. Links tibialis anterior, gastrocnemius, soleus, and fibularis muscles to ankle movements.

Lesson 4 • Intrinsic Muscles of the Foot

Identifies the plantar and dorsal intrinsic foot muscles and their arch-support role. Connects foot muscle function to balance and propulsion during walking.